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Finding the Fourth Proportional to 610,420.80, 915,631.20 and 278,644.80

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Solution

The fourth proportional to 610,420.80, 915,631.20 and 278,644.80 is: 417,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,420.80 : 915,631.20 = 278,644.80 : x
  2. Step 2: Convert to fraction form
    610,420.80/915,631.20 = 278,644.80/x
  3. Step 3: Cross multiply
    610,420.80x = 915,631.20 × 278,644.80
  4. Step 4: Simplify right side
    610,420.80x = 255,135,872,597.76
  5. Step 5: Solve for x
    x = 255,135,872,597.76/610,420.80
  6. Step 6: Final answer
    x = 417,967.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.